bmeurer 5d18e93bd6 Revert of binary-operator-reducer: reduce mul+div(shift) (patchset #11 id:200001 of https://codereview.chromium.org/1350223006/ ) ... Reason for revert: This is also unsound for the reasons outlined in https://codereview.chromium.org/1473073004/ Will help Fedor to implement a solution based on simplified operators. Original issue's description: > binary-operator-reducer: reduce mul+div(shift) > > Reduction Input: > > ChangeInt32ToFloat64=> TruncateFloat64ToInt32 > Float64Mul=> > ChangeInt32ToFloat64=> Float64Div=>TruncateFloat64ToInt32 > > Output: > > => TruncateInt64ToInt32 > Int64Mul > => Int64Shr => TruncateInt64ToInt32 > > Test code: > > function mul(a, b) { > var l = a & 0x3ffffff; > var h = b & 0x3ffffff; > var m = l * h; > > var rl = m & 0x3ffffff; > var rh = (m / 0x4000000) | 0; > > return rl | rh; > } > > mul(1, 2); > var a0 = mul(0x3ffffff, 0x3ffffff); > mul(0x0, 0x0); > %OptimizeFunctionOnNextCall(mul); > var a1 = mul(0x3ffffff, 0x3ffffff); > > print(a0 + ' == ' + a1); > > BUG= > R=mstarzinger@chromium.org > > Committed: https://crrev.com/461e5b49d022335a7fc4e9d172397a4bd48b93d4 > Cr-Commit-Position: refs/heads/master@{#31899} TBR=mstarzinger@chromium.org,danno@chromium.org,titzer@chromium.org,fedor@indutny.com NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG= Review URL: https://codereview.chromium.org/1478923002 Cr-Commit-Position: refs/heads/master@{#32313}		2015-11-26 06:16:01 +00:00
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base	[presubmit] Enabling readability/inheritance linter checking.	2015-11-04 13:08:42 +00:00
compiler	Revert of binary-operator-reducer: reduce mul+div(shift) (patchset #11 id:200001 of https://codereview.chromium.org/1350223006/ )	2015-11-26 06:16:01 +00:00
heap	Remove special handling of background idle notification in memory reducer.	2015-10-27 12:35:56 +00:00
interpreter	[es6] Correct parsing of regular expression literal flags.	2015-11-25 13:46:43 +00:00
libplatform	[presubmit] Enabling readability/inheritance linter checking.	2015-11-04 13:08:42 +00:00
runtime	[presubmit] Enable readability/namespace linter checking.	2015-09-30 13:47:11 +00:00
atomic-utils-unittest.cc	Add barriers to atomic utils.	2015-09-15 14:58:54 +00:00
cancelable-tasks-unittest.cc	Fix gcc 4.9.2 signed-compare error.	2015-11-15 12:48:19 +00:00
char-predicates-unittest.cc	Conform to the unittest naming convention.	2014-10-10 08:06:21 +00:00
counters-unittest.cc	Fix more -Werror=sign-compare bugs with GCC 4.9.2	2015-05-11 11:07:15 +00:00
DEPS	Move unit tests to test/unittests.	2014-10-01 08:34:25 +00:00
locked-queue-unittest.cc	Add lock-based unbounded queue	2015-11-18 10:54:13 +00:00
run-all-unittests.cc	[presubmit] Enabling readability/inheritance linter checking.	2015-11-04 13:08:42 +00:00
test-utils.cc	Debugger: move implementation to a separate folder.	2015-07-31 11:08:15 +00:00
test-utils.h	Pass ArrayBuffer::Allocator via Isolate::CreateParams	2015-04-29 09:54:43 +00:00
unittests.gyp	Revert of binary-operator-reducer: reduce mul+div(shift) (patchset #11 id:200001 of https://codereview.chromium.org/1350223006/ )	2015-11-26 06:16:01 +00:00
unittests.isolate	Reland [swarming] Isolate v8 testing.	2015-10-05 09:48:42 +00:00
unittests.status	Fix platform unittests.	2014-11-25 07:22:00 +00:00